JPS6214795Y2 - - Google Patents
Info
- Publication number
- JPS6214795Y2 JPS6214795Y2 JP376879U JP376879U JPS6214795Y2 JP S6214795 Y2 JPS6214795 Y2 JP S6214795Y2 JP 376879 U JP376879 U JP 376879U JP 376879 U JP376879 U JP 376879U JP S6214795 Y2 JPS6214795 Y2 JP S6214795Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- voice coil
- upper plate
- speaker
- magnetic gap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011553 magnetic fluid Substances 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- ZDWGXBPVPXVXMQ-UHFFFAOYSA-N bis(2-ethylhexyl) nonanedioate Chemical compound CCCCC(CC)COC(=O)CCCCCCCC(=O)OCC(CC)CCCC ZDWGXBPVPXVXMQ-UHFFFAOYSA-N 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Description
【考案の詳細な説明】
本考案は磁性流体を磁気ギヤツプに充填して構
成されるスピーカに係り、磁気ギヤツプに工夫を
加えて特性の安定したものを提供しようとするも
のである。[Detailed Description of the Invention] The present invention relates to a speaker constructed by filling a magnetic gap with magnetic fluid, and is an attempt to provide a speaker with stable characteristics by adding innovation to the magnetic gap.
従来におけるスピーカとしては第１図に示すよ
うに構成されていた。 A conventional speaker was constructed as shown in FIG.
すなわち、センターポール１を有するプレート
２上にリンク状のマグネツト３と同じくリング状
の上部プレート４によつて構成された磁気回路５
の上面にエツジ固定リング６，７を介してドーム
状振動板８を取付け、このドーム状振動板８にボ
イスコイル９を結合し、このボイスコイル９を上
記磁気回路５の磁気ギヤツプ１０にはめこんで構
成されていた。 That is, a magnetic circuit 5 is formed by a link-shaped magnet 3 on a plate 2 having a center pole 1 and a ring-shaped upper plate 4.
A dome-shaped diaphragm 8 is attached to the upper surface via edge fixing rings 6 and 7, a voice coil 9 is coupled to this dome-shaped diaphragm 8, and this voice coil 9 is fitted into the magnetic gap 10 of the magnetic circuit 5. It was composed of.
このような構成において、ボイスコイル９に過
大な入力信号を印加すると、ボイスコイル９にジ
ユール熱を発生して著しく温度上昇し、この温度
上昇によつてボイスコイル９のコイルがボビンよ
り脱落したり、焼損したりするものであつた。 In such a configuration, if an excessive input signal is applied to the voice coil 9, the voice coil 9 will generate Joule heat and its temperature will rise significantly, and this temperature rise may cause the coil of the voice coil 9 to fall off from the bobbin. It was something that could burn out.
このようなことから、最近では磁気ギヤツプ１
０中に、アゼライン酸ジ（２−エチルヘキシル）
CH2〔（CH2）3COOC8H17〕中に酸化鉄Fe3O4の300
Å以下の粉末を界面滑性剤を介して混合した液体
などの磁性流体を充填して、ボイスコイル９に発
生する熱を速やかに上部プレート４やセンターポ
ール１に伝達して放熱性の優れたものにするとい
つた構成が採用されつつある。 For this reason, recently magnetic gap 1
0, di(2-ethylhexyl) azelate
300 of iron oxide Fe 3 O 4 in CH 2 [(CH 2 ) 3 COOC 8 H 17 ]
The heat generated in the voice coil 9 is quickly transferred to the upper plate 4 and the center pole 1 by filling it with a magnetic fluid such as a liquid made by mixing powder with a particle size of less than 100 Å through an interfacial lubricant, thereby achieving excellent heat dissipation. A new structure is being adopted.
しかしながら、磁気ギヤツプ１０が磁性流体に
より空気流通の無い状態、つまりエアシールド状
態になれば、ドーム状振動板８のエツジ８′と上
部プレート４との間の空間の気圧が組立時と動作
時には大きく変化し、エツジ８′が柔かい材料で
構成されていると、エツジ８′が変形し、スピー
カとしての特性を大幅に低下させてしまう欠点が
あつた。 However, if the magnetic gap 10 is in a state where there is no air circulation due to the magnetic fluid, that is, an air shield state, the air pressure in the space between the edge 8' of the dome-shaped diaphragm 8 and the upper plate 4 becomes large during assembly and operation. If the edge 8' is made of a soft material, the edge 8' will be deformed, resulting in a disadvantage that the characteristics as a speaker will be significantly degraded.
本考案は以上のような従来の欠点を除去するも
のである。 The present invention eliminates the above-mentioned drawbacks of the prior art.
以下、本考案の実施例を図面第２図、第３図に
より説明する。 Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.
１１はセンターボール１２を上面中央に備えた
プレートで、このプレート１１上にはリング状の
マグネツト１３、同じくリング状の上部プレート
１４が配置されて磁気回路１５を構成している。 Reference numeral 11 designates a plate having a center ball 12 at the center of its upper surface.A ring-shaped magnet 13 and a ring-shaped upper plate 14 are arranged on this plate 11 to form a magnetic circuit 15.
この磁気回路１５の上面にはエツジ固定リング
１６，１７を介してドーム状振動板１８が固着さ
れている。このドーム状振動板１８のドーム部の
立上り部にはボイスコイル１９が結合され、この
ボイスコイル１９はセンターポール１２と上部プ
レート１４との間で形成される磁気ギヤツプ２０
にはまりこんでいる。 A dome-shaped diaphragm 18 is fixed to the upper surface of the magnetic circuit 15 via edge fixing rings 16 and 17. A voice coil 19 is coupled to the rising portion of the dome portion of the dome-shaped diaphragm 18, and this voice coil 19 is connected to a magnetic gap 20 formed between the center pole 12 and the upper plate 14.
I'm addicted to it.
また、このボイスコイル１９と上部プレート１
４の内周面間には磁性流体２１が充填されてい
る。この磁性流体２１は上述した組成のものを用
いることができる。 In addition, this voice coil 19 and the upper plate 1
A magnetic fluid 21 is filled between the inner circumferential surfaces of 4. This magnetic fluid 21 can have the composition described above.
さらに、この上部プレート１４の内周面の数個
所には切欠部２２が設けられており、この切欠部
２２を設けた部分は他の磁気ギヤツプ２０より磁
束密度が小さいため磁性流体２１が保持されず、
ドーム状振動板１８のエツジ１８′と上部プレー
ト１４の上面との間で形成される空間２３は磁気
ギヤツプ２０の下面の空間２４と切欠部２２によ
り連通され、スピーカが動作してもその空間２３
の気圧の変化はほとんど発生しないことになり、
エツジ１８′としてどのように柔かい材料を用い
てもエツジ１８′の変形は発生しない。 Furthermore, notches 22 are provided at several locations on the inner circumferential surface of the upper plate 14, and the magnetic fluid 21 is held in the portions where the notches 22 are provided because the magnetic flux density is lower than that of the other magnetic gaps 20. figure,
A space 23 formed between the edge 18' of the dome-shaped diaphragm 18 and the upper surface of the upper plate 14 is communicated with a space 24 on the lower surface of the magnetic gap 20 through a notch 22, so that even when the speaker operates, the space 23
There will be almost no change in atmospheric pressure,
No matter how soft the material is used for the edge 18', deformation of the edge 18' will not occur.
なお、上記実施例ではボイスコイル１９の外周
面側のみに磁性流体２１を充填するものについて
示したが内周面側に磁性流体を充填し、センター
ポール１２に切欠部を設けてもよいし、ボイスコ
イル１９の内外周面の両側に磁性流体２１を充填
し、上部プレート１４、センターポール１２に切
欠部を設ける構成とすることもできる。 In the above embodiment, only the outer peripheral surface of the voice coil 19 is filled with the magnetic fluid 21, but the inner peripheral surface may be filled with the magnetic fluid and a notch may be provided in the center pole 12. It is also possible to fill both sides of the inner and outer peripheral surfaces of the voice coil 19 with the magnetic fluid 21, and to provide a notch in the upper plate 14 and the center pole 12.
以上のように本考案のスピーカは構成されるた
め、ボイスコイルのジユール熱による温度上昇を
磁気ギヤツプに充填した磁性流体で放熱して低く
抑えるとともに、ドーム状振動板と磁気回路間の
小空間を切欠部で磁気回路内の空間と連通させる
ため、動作時の小空間の気圧変動も大きくなくな
つて振動板の変形などを発生することなく、特性
の安定したものとすることができ、しかも、切欠
部を設けるために磁気回路内の空間を広げる必要
もなく、全体の小型化にも対応でき、実用的価値
の大なるものである。 As the speaker of the present invention is constructed as described above, the temperature rise due to the voice coil's heat is suppressed by dissipating the heat with the magnetic fluid filled in the magnetic gap, and the small space between the dome-shaped diaphragm and the magnetic circuit is reduced. Since the notch communicates with the space in the magnetic circuit, the pressure fluctuations in the small space during operation are not large, and the characteristics can be stabilized without causing deformation of the diaphragm. There is no need to enlarge the space within the magnetic circuit in order to provide a notch, and the overall size can be reduced, which is of great practical value.
第１図は従来のスピーカを示す半断面図、第２
図は本考案のスピーカの一実施例を示す半断面
図、第３図は同要部の半上面図である。
１１……プレート、１２……センターポール、
１３……マグネツト、１４……上部プレート、１
５……磁気回路、１８……振動板、１９……ボイ
スコイル、２０……磁気ギヤツプ、２１……磁性
流体。
Figure 1 is a half-sectional view of a conventional speaker;
The figure is a half sectional view showing one embodiment of the speaker of the present invention, and FIG. 3 is a half top view of the main parts. 11...Plate, 12...Center pole,
13... Magnet, 14... Upper plate, 1
5...Magnetic circuit, 18...Diaphragm, 19...Voice coil, 20...Magnetic gap, 21...Magnetic fluid.
Claims (1)
磁気回路の磁気ギヤツプにはめこんだボイスコイ
ルに振動板を結合してなるスピーカにおいて、上
記上部プレートの上記磁気ギヤツプに対向する内
周端面に、上記上部プレートの上下面に連続する
切欠部を設け、この切欠部に対応する部分以外の
上記磁気ギヤツプに磁性流体を充填してなるスピ
ーカ。 In a speaker in which a diaphragm is coupled to a voice coil fitted in a magnetic gap of a magnetic circuit formed between a center pole and an upper plate, the upper plate A speaker in which a continuous cutout is provided on the upper and lower surfaces of the magnetic gap, and a magnetic fluid is filled in the magnetic gap other than the portion corresponding to the cutout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP376879U JPS6214795Y2 (en) | 1979-01-16 | 1979-01-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP376879U JPS6214795Y2 (en) | 1979-01-16 | 1979-01-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55104894U JPS55104894U (en) | 1980-07-22 |
| JPS6214795Y2 true JPS6214795Y2 (en) | 1987-04-15 |
Family
ID=28808057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP376879U Expired JPS6214795Y2 (en) | 1979-01-16 | 1979-01-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6214795Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7729504B2 (en) * | 2006-02-14 | 2010-06-01 | Ferrotec Corporation | Ferrofluid centered voice coil speaker |
| WO2014097632A1 (en) * | 2012-12-20 | 2014-06-26 | パナソニック株式会社 | Speaker device, audiovisual device, portable information processing device, mobile body, and earphone |
-
1979
- 1979-01-16 JP JP376879U patent/JPS6214795Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55104894U (en) | 1980-07-22 |
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